Incremental Loading and CDC
A nightly job filtering on updated_at looks right until rows quietly go missing. Here is how each change-capture method works, and what none of them can see.
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ETL vs ELT, Batch vs Streaming
“We need a pipeline” hides several decisions. See when to copy data or call its owner, where to transform, how fresh to be, and who pays and owns each part.
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Data Aggregation
Learn what aggregation means when it refers to gathering sources rather than summarizing rows, and which decisions it hides inside a merged table.